<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>编辑博客</title>
    <style type="text/css">
      body {
        margin: 0 20px;
        line-height: 1;
      }
      a {
        text-decoration-line: none;
      }
      .title-wrapper {
        margin-bottom: 10px;
      }
      .title-wrapper input {
        width: 300px;
      }
      .content-wrapper textarea {
        width: 300px;
        height: 150px;
      }
    </style>
  </head>
  <body>
    <h1 style="border-bottom: 1px solid #ccc; padding-bottom: 10px">编辑博客</h1>
    <div>
      <div class="title-wrapper">
        <input id="text-title" />
      </div>
      <div class="content-wrapper">
        <textarea id="text-content"></textarea>
      </div>
      <div>
        <button id="btn-update">保存</button>
      </div>
    </div>

    <script src="./jQuery.js"></script>
    <script>
      // 发送 get 请求
      function get(url) {
        return $.get(url);
      }

      // 发送 post 请求
      function post(url, data = {}) {
        return $.ajax({
          type: "post",
          url,
          data: JSON.stringify(data),
          contentType: "application/json",
        });
      }

      // 获取 url 参数
      function getUrlParams() {
        let paramStr = location.href.split("?")[1] || "";
        paramStr = paramStr.split("#")[0];
        const result = {};
        paramStr.split("&").forEach((itemStr) => {
          const arr = itemStr.split("=");
          const key = arr[0];
          const val = arr[1];
          result[key] = val;
        });
        return result;
      }

      // 获取 dom 元素
      const $textTitle = $("#text-title");
      const $textContent = $("#text-content");
      const $btnUpdate = $("#btn-update");

      // 获取博客内容
      const urlParams = getUrlParams();
      const url = "/api/blog/detail?id=" + urlParams.id;
      get(url).then((res) => {
        if (res.errno !== 0) {
          alert("操作错误");
          return;
        }

        // 显示数据
        const data = res.data || {};
        $textTitle.val(data.title);
        $textContent.val(data.content);
        $btnUpdate.attr("data-id", data.id || data._id);
      });

      // 提交修改内容
      $btnUpdate.click(function () {
        const $this = $(this);
        const id = $this.attr("data-id");
        const title = $textTitle.val();
        const content = $textContent.val();

        const url = "/api/blog/update";
        const data = {
          title,
          content,
          id,
        };
        post(url, data).then((res) => {
          if (res.errno !== 0) {
            alert("操作错误");
            return;
          }
          alert("更新成功");
          location.href = "/admin.html";
        });
      });
    </script>
  </body>
</html>
